package com.nxk.modules.utils;

import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;

public class CommonUtils {

     /**
     * 获取当前网络ip
     * @param request
     * @return
     */
    public static String getIpAddr(HttpServletRequest request){
        String ipAddress = request.getHeader("x-forwarded-for");
            if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("Proxy-Client-IP");
            }
            if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("WL-Proxy-Client-IP");
            }
            if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getRemoteAddr();
                if(ipAddress.equals("127.0.0.1") || ipAddress.equals("0:0:0:0:0:0:0:1")){
                    //根据网卡取本机配置的IP
                    InetAddress inet=null;
                    try {
                        inet = InetAddress.getLocalHost();
                    } catch (UnknownHostException e) {
                        e.printStackTrace();
                    }
                    ipAddress= inet.getHostAddress();
                }
            }
            //对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
            if(ipAddress!=null && ipAddress.length()>15){ //"***.***.***.***".length() = 15
                if(ipAddress.indexOf(",")>0){
                    ipAddress = ipAddress.substring(0,ipAddress.indexOf(","));
                }
            }
            return ipAddress;
    }

    /**
     * 获取浏览器名称
     * @param request
     * @return
     */
    public static String getBrowserName(HttpServletRequest request){
        // 获取请求头：user-agent
		String userAgent = request.getHeader("user-agent");
		// 判断用户使用的浏览器类型
		if (userAgent.contains("Firefox")){
			return "火狐浏览器";
		}else if (userAgent.contains("Chrome")){
			return "谷歌浏览器";
		}else if (userAgent.contains("Trident")){
			return "IE 浏览器";
		}else{
			return "其他 浏览器";
		}
    }
}
